Grain separator



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.Iliams JHMH S May 15, 1923.

O. W. WlLLlAMS GRAINSEPARATOR Filed Dec. 8, 1921 Patented May 15, 1923.

ORA.WOOD WILLIAMS, OF MINNEAPOLIS, MINNESOTA.

GRAIN snrnna'ron. I

Application filed December 8, 1921. Serial No. 521,002.

, tains to make and use the same.

My present invention is especially intended as an improvement on the type of grain separator disclosed and claimed in my pending application Serial Number 511,727, filed October 31, 1921, but involves certain features that are capable of general application to separators of the type wherein the separation is made by drums, cylinders or the like equipped with pockets. The chief novelty of the present invention is directed to an improved form of pocket for more effectually accomplishing the separation of materials of different size and shape, such as the separation from wheat of oats, cockle, wild peas and various small seeds.

, In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is a view partly in end elevation and partly in transverse vertical section illustrating the several features of my invention as incorporated in a separator of the general type disclosed in my said prior application;

Fig. 2 is a fragmentary transverse section showing aportion of the separating drum, a portion of the hopper which is located therein and a blast-producing device that is 10- cated outside'of the drum;

Fig. 3 is a face view or elevation looking at the inner pocketed surface of the drum and showing but a fragment thereof;

Fig. 4 is a section on the line 4-4t of Fig. 3;

Fig. 5 is a fragmentary view correspond ing to Fig. 3 but showing the pockets on a larger scale; and

Fig. 6 is a section on the line 6-6 of Fig. 5.

The numeral 7 indicates the separating drum or cylinder, the same, as shown, having exterior flanges 8 that run in curved supporting rollers 9. Within the drum is a collecting hopper 10 formed at the axis of the drum with a semi-cylindrical depression in which, as shown, is a spiral conveyor 11. The drum may be rotated by any suitable means.

The inner surface of this drum or cylinder is provided with pockets of very peculiar and novel form, best illustrated in Figs. 3 to 6, inclusive. These pockets are formed by deep concave depressions 12 that are elongated transversely of the line of movement of the pockets and at their central portions have depending or downwardly extended discharge throats 13 that decrease in depth and preferably also in width, in a downward direction. By reference particularly to Figs. 4 and 6, it will be noted that the pockets 12 have much greater depth and that their bottoms. are rounded in all directions. The discharge throats 13 are prefer ably approximately V-shaped in cross section and, at places wherethey join the pockets, have slightly greater depth than the pockets themselves. Moreover, the lower sides of the pockets are inclined or rounded so that there will be a tendency of small seeds to roll, under the action of gravity, from the extremities of the pockets to the bottoms of the discharge throats and from. thence downward to the diminished ends of the throats.

For the separation of oats and other foreign materials from wheat, the pockets 12 are made of such size that they will receive freely the largest kernels of wheat but are not long enough to receive oats. They will, of course, receive all of the smaller seeds, such as cockle, wild peas, wild mustard and other small seeds. On the rising side of the drum, the pockets will carry all of these seeds or materials upward, but all of the round small seeds will quickly run into the discharge throats and out of the pockets. As the oats cannot get completely into the pockets, they will also quickly fall into the discharge throats and slip from the pockets. The wheat, however, can fall deep into the pockets and, hence, will be carried to a much higher point than any of the other seeds or materials. In fact, the oats and other foreign seeds will run from the pockets before they have been carried upward as high as the edge of the hopper 10, but the wheat will be carried above the hopperand, when finally discharged, will drop into the hopper.

For some classes of work, the efficiency of the machine may be increased by using illustrated in Fig, 1 and comprises an air. delivery tube 14 that extends through the drum below the hopper and is provided with upwardly extended discharge nozzles 15' that have dependingdeflecting flanges 16 that direct the blast directly downward over the upwardly moving pocketed surface of the drum. The wheat being deeply seated in the pockets, will not be disturbed by this downward blast, but the other materials, as they run toward-or into the" discharge throats 13, will be caught by the downwardblas't and their downward movement will be greatly hastened thereby. The wheat, when seated in the pockets, will be supported by engagement of its ends with the end portions of the pockets and with its centraliportion free from thelower deepest portion of the discharge throat g The numeral 17 indicates spiralconveyors such as illustrated in my priorapplication, which work over the lower. surface, of the drum for ejecting therefrom the oats and other rejected foreign-n1aterials. lhe numeral 18 indicates a'deflectin'g plate shown as supported from the air pipe 14 and overly' ingths upper spiral conveyor 17 to prerent the. downward air blast from acting directly thereon; v 1

For insuring the dischiargeof all of the wheat from the pockets after ithas-been carried above the hopper, I may employ an air blast device comprising an air tube 1-9, provided adjacent to the outer surface of the drum 'ith discharge perforations 20 and air-confining flanges 21. To renderthis device effective the pockets 12am provided with small air passages 22 th atlead from the bottomsthereof. outward through the drum,

(see, particularly Fig. 2).

YVhat I claim is: 1. A sep aratin-g surface formed with pockets having centrally depending discharge throatsthat downwardly decrease in-depth.

2; A separating surface formed with pockcts that are'elongated transversely of the'direction of; movement thereof and are formed with centrally depending discharge throats. I 3. A separating surface formed with pockets that are elongated transversely of the di rection of'movement thereof and are formed with centrally depending discharge throats that decrease both in depth and width'in a depth in a downward direction N 6. A separating surface formed with pockets having centrally depending discharge throats means for moving sa d pocketed separating surface upwardly, said pockets having perforatedbottoms,- and means for blowing a blast of a-irv throughthe perforati'ons ofsaid, pockets after they have reached a predetermined altitude, I a i I ;7- A separating drum 'providedon its inner surface with-pockets that areelongated transversely ofthe directiono'f movement, of. said pockets,- said pockets having .centrally depending discharge throats. means for rotatingsaid drum. and means for blowing a blast of air downward over. the upwardly moving pocketed surface of said drum.

8. A separating drum provided on' its inn'er -surface with pockets that are elongated transversely of the direction of movement of said pockets, said ipocketszhaving. centrally depending discharge. throats, a hopperwithin said. ,drum, meansv for rotating drum, the pocketsof said'drum having perforated bottoms, and-means for blowing a blast of air through the perforated bottomsgof said pockets after they have been moved toa' position-above said hopper.

ture.

In testimony whereof I 'aiiix my signa;

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